x1, y1, x2, y2 = map(float, input().split())
distance = ((x1 - x2) ** 2 + (y1 - y2) ** 2) ** (1 / 2)
print(f"{distance:.5f}") x1, y1, x2, y2 = map(float, input().split()) x1 map(float, input().split()) map float input().split() ().split () input split y1 x2 y2 distance = ((x1 - x2) ** 2 + (y1 - y2) ** 2) ** (1 / 2) distance ((x1 - x2) ** 2 + (y1 - y2) ** 2) ** (1 / 2) (x1 - x2) ** 2 + (y1 - y2) ** 2 (x1 - x2) ** 2 x1 - x2 x1 x2 2 (y1 - y2) ** 2 y1 - y2 y1 y2 2 1 / 2 1 2 print(f"{distance:.5f}") print f"{distance:.5f}" x1, y1, x2, y2 = map(float, input().split()) map(float, input().split()) x1 y1, x2, y2 = map(float, input().split()) map(float, input().split()) y1 x2, y2 = map(float, input().split()) map(float, input().split()) x2 y2 = map(float, input().split()) map(float, input().split()) y2 distance = ((x1 - x2) ** 2 + (y1 - y2) ** 2) ** (1 / 2) ((x1 - x2) ** 2 + (y1 - y2) ** 2) ** (1 / 2) distance
x1, y1, x2, y2 = map(float, input().split())
distance = ((x1 - x2) ** 2 + (y1 - y2) ** 2) ** (1 / 2)
print(f"{distance:.5f}")
